<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        a:link{
            color: red;
        }

        a:visited{
            color: orange;
        }

        a:hover{
            color: greenyellow;
        }

        a:active{
            color: deepskyblue;
        }

    </style>
</head>
<body>
<a href="https://lilichao.com">访问过的</a>
<a href="https://lilichao1111.com">未访问过的</a>
</body>
</html>